<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    var numStr = "1234"
    var result = numStr
    console.log(typeof result);

    // 隐式转换
    var isAdmin = true
    var result2 = isAdmin + 10
    console.log(result2) // 11 isAdmin-> 1

    

  </script>
</body>

</html>